New Feature: Playlist Center! Pick a topic and let our playlists guide the way.

Start learning with our library of video tutorials taught by experts. Get started

After Effects Apprentice 13: Paint, Roto, and Puppet
Illustration by John Hersey

Finishing the reveal


From:

After Effects Apprentice 13: Paint, Roto, and Puppet

with Chris Meyer and Trish Meyer

Video: Finishing the reveal

In the previous movie, you created an animated stroke in the layer's Alpha Channel. If I bring the Layer panel forward and scrub its timeline, I have painted an animated white stroke in the Alpha Channel. Because the layer is black and outside the layer is also black, I'm simply extending the Alpha Channel beyond the original source. And if the layer you are using is an interesting image, outside of that Alpha Channel might look quite strange, and we covered why that is in an earlier movie.

Watch this entire course now—plus get access to every course in the library. Each course includes high-quality videos taught by expert instructors.

Become a member
please wait ...
After Effects Apprentice 13: Paint, Roto, and Puppet
3h 11m Intermediate Dec 21, 2011 Updated Dec 12, 2012

Viewers: in countries Watching now:

In this course, Trish and Chris Meyer introduce a series of creative tools inside Adobe After Effects. The centerpiece is Paint, where Trish demonstrates how to use the Brush, Eraser, and Clone Stamp tools to draw on a layer, remove portions of it, or repeat elements around a composition. These tools can be used for artistic purposes as well as to repair problem areas in footage. Chris shows off the Puppet tools for distorting layers, and the incredible Roto Brush, introduced in After Effects CS6, which allows you to separately define foreground and background elements so that you can replace backgrounds and selectively add special effects.

The After Effects Apprentice videos on lynda.com were created by Trish and Chris Meyer and are designed to be used on their own and as a companion to their book After Effects Apprentice. We are honored to host these tutorials in the lynda.com library.

Topics include:
  • Creating, erasing, and animating brush and clone strokes
  • Using Paint to reveal a layer over time
  • Creating animated distortions to flat artwork with the Puppet tools
  • Replacing backgrounds with the Roto Brush
Subjects:
Video Motion Graphics Visual Effects
Software:
After Effects
Authors:
Chris Meyer Trish Meyer

Finishing the reveal

In the previous movie, you created an animated stroke in the layer's Alpha Channel. If I bring the Layer panel forward and scrub its timeline, I have painted an animated white stroke in the Alpha Channel. Because the layer is black and outside the layer is also black, I'm simply extending the Alpha Channel beyond the original source. And if the layer you are using is an interesting image, outside of that Alpha Channel might look quite strange, and we covered why that is in an earlier movie.

Now we need to finish off this effect so that the stroke wipes on the original layer. I have the Composition panel on the left. I will set it to 100% so you can see what's going on more clearly. I still have my Project panel. I'll just tidy up my workspace. I will select the layer and then select either F3 or open Effect>Effect Controls. And you will see that paint is an effect with just one parameter; Paint on Transparent. You will also notice that it does appear in the timeline, if you twirl up Paint and twirl it back down again.

But when you press U to see your keyframes, it doesn't show you that option automatically. So either in the timeline or in the Effect Controls panel, we need to turn on Paint on Transparent. We will turn that on and now at the beginning of the comp, the layer will be transparent. Again, my image is black and by extending the Alpha Channel, I am simply extending the black pixels. If you have a colorful image, you'll see the image wipe on, but the edge will not be clean.

So next, we need to apply an effect after the paint stroke that will retrieve the original Alpha Channel from the source and then apply it on top of the blobby strokes. The effect we are looking for is Effect> Channel>Set Matte, and that applies to Set Matte effect after the Paint effect. The defaults are actually just fine. What the Set Matte effect will do is take a matte from a layer and the default is to use the layer it's currently applied to.

The next parameter asks which channel should I use for a matte. Again, the default of Alpha Channel is correct. And by the way, the Set Matte effect is a very old effect. But once the Track Matte feature was added to After Effects, the Set Matte effect became less useful, but it is a way to use a matte from a different layer if you need to. You will notice in the Layer panel, it's also cleaned up the edges. So now the layer wipes on in the Alpha Channel as well.

Remember, in the View pop-up, you have a choice to see the Paint effect and that shows you the paint before the Set Matte has been applied. To see it after Set Matte, you will need to make sure Set Matte is enabled and to divide as a View pop-up, you will also see the Render checkbox. You want to make sure this is enabled as well. Otherwise, the effect is not actually rendered and all you see is the original image. Now, if you would like to practice this technique with any other layers, I will turn off the solo button and remind you that there are other layers in this comp.

We'll resize it with the triangle, notice if you start revealing from the center and then move along this line, the line eventually gets thicker. So if you are not using a pressure sensitive tablet, you may need to animate the diameter of the stroke. That way you can create a small stroke in the middle and then increase the diameter when the area you are trying to reveal becomes larger. If you have the exercise files, go ahead and preview the final composition again.

That might give you a few more ideas.

There are currently no FAQs about After Effects Apprentice 13: Paint, Roto, and Puppet.

 
Share a link to this course

What are exercise files?

Exercise files are the same files the author uses in the course. Save time by downloading the author's files instead of setting up your own files, and learn by following along with the instructor.

Can I take this course without the exercise files?

Yes! If you decide you would like the exercise files later, you can upgrade to a premium account any time.

Become a member Download sample files See plans and pricing

Please wait... please wait ...
Upgrade to get access to exercise files.

Exercise files video

How to use exercise files.

Learn by watching, listening, and doing, Exercise files are the same files the author uses in the course, so you can download them and follow along Premium memberships include access to all exercise files in the library.
Upgrade now


Exercise files

Exercise files video

How to use exercise files.

For additional information on downloading and using exercise files, watch our instructional video or read the instructions in the FAQ.

This course includes free exercise files, so you can practice while you watch the course. To access all the exercise files in our library, become a Premium Member.

join now Upgrade now

Are you sure you want to mark all the videos in this course as unwatched?

This will not affect your course history, your reports, or your certificates of completion for this course.


Mark all as unwatched Cancel

Congratulations

You have completed After Effects Apprentice 13: Paint, Roto, and Puppet.

Return to your organization's learning portal to continue training, or close this page.


OK
Become a member to add this course to a playlist

Join today and get unlimited access to the entire library of video courses—and create as many playlists as you like.

Get started

Already a member?

Become a member to like this course.

Join today and get unlimited access to the entire library of video courses.

Get started

Already a member?

Exercise files

Learn by watching, listening, and doing! Exercise files are the same files the author uses in the course, so you can download them and follow along. Exercise files are available with all Premium memberships. Learn more

Get started

Already a Premium member?

Exercise files video

How to use exercise files.

Ask a question

Thanks for contacting us.
You’ll hear from our Customer Service team within 24 hours.

Please enter the text shown below:

The classic layout automatically defaults to the latest Flash Player.

To choose a different player, hold the cursor over your name at the top right of any lynda.com page and choose Site preferencesfrom the dropdown menu.

Continue to classic layout Stay on new layout
Exercise files

Access exercise files from a button right under the course name.

Mark videos as unwatched

Remove icons showing you already watched videos if you want to start over.

Control your viewing experience

Make the video wide, narrow, full-screen, or pop the player out of the page into its own window.

Interactive transcripts

Click on text in the transcript to jump to that spot in the video. As the video plays, the relevant spot in the transcript will be highlighted.

Are you sure you want to delete this note?

No

Thanks for signing up.

We’ll send you a confirmation email shortly.


Sign up and receive emails about lynda.com and our online training library:

Here’s our privacy policy with more details about how we handle your information.

Keep up with news, tips, and latest courses with emails from lynda.com.

Sign up and receive emails about lynda.com and our online training library:

Here’s our privacy policy with more details about how we handle your information.

   
submit Lightbox submit clicked
Terms and conditions of use

We've updated our terms and conditions (now called terms of service).Go
Review and accept our updated terms of service.